Near-infrared(NIR)phosphor-converted light emitting diodes(pc-LEDs)highly demand broadband NIR phosphors for applications in food safety and smart detection.However,the lack of tunable NIR luminescent materials limits...Near-infrared(NIR)phosphor-converted light emitting diodes(pc-LEDs)highly demand broadband NIR phosphors for applications in food safety and smart detection.However,the lack of tunable NIR luminescent materials limits their development.Herein,we constructed a series of NIR Cr^(3+)doped Ga_(2)O_(3)-based materials with broadband,tunable,efficient emissions by utilizing[Zn^(2+)–Ge^(4+)]and[Ga^(3+)–Ga^(3+)]co-unit substitution.The obtained results show that the emission peak of NIR phosphors can be modulated from 713 to 765 nm.Meanwhile,the excitation peak remains in the blue light region.NIR phosphor-converted devices were prepared with 450 nm LED chips,which were studied using NIR imaging,penetration imaging,anti-counterfeiting,and pupil recognition technologies.Interestingly,NIR mechanoluminescence(ML)was realized based on the developed phosphors,which were successfully applied for nondestructive measurements of solids and in vivo bioimaging.Our study proposes a series of tunable and broadband luminescent materials and devices for NIR applications.展开更多
Flexible sensing array integrated with multiple sensors is an attractive approach for flight parameter detection.However,the poor resolution of flexible sensors and time-consuming neural network processes mitigate the...Flexible sensing array integrated with multiple sensors is an attractive approach for flight parameter detection.However,the poor resolution of flexible sensors and time-consuming neural network processes mitigate their accuracy and adaptability in predicting flight parameters.Here we present an ultra-thin flexible sensing patch with a new configuration,comprising a differential pressure sensor array and a vector flow velocity sensor.The capacitive differential pressure sensor array is fabricated by a multilayer polyimide bonding technique,reaching a resolution of 0.14 Pa.To solve flight parameters with the flexible sensing patch,we develop an analytical pressure-velocity fusion algorithm,enabling fast response and high accuracy in flight parameter detection.The average errors in calculating the angle of attack,angle of sideslip,and airspeed are 0.22°,0.35°,and 0.73 m s^(-1),respectively.The high-resolution flexible sensors and novel analytical pressure-velocity fusion algorithm pave the way for flexible sensing patch-based air data sensing techniques.展开更多
基金supported by the Zhejiang Provincial Natural Science Foundation of China(LR24F050002)the National Natural Science Foundation of China(62175225).
文摘Near-infrared(NIR)phosphor-converted light emitting diodes(pc-LEDs)highly demand broadband NIR phosphors for applications in food safety and smart detection.However,the lack of tunable NIR luminescent materials limits their development.Herein,we constructed a series of NIR Cr^(3+)doped Ga_(2)O_(3)-based materials with broadband,tunable,efficient emissions by utilizing[Zn^(2+)–Ge^(4+)]and[Ga^(3+)–Ga^(3+)]co-unit substitution.The obtained results show that the emission peak of NIR phosphors can be modulated from 713 to 765 nm.Meanwhile,the excitation peak remains in the blue light region.NIR phosphor-converted devices were prepared with 450 nm LED chips,which were studied using NIR imaging,penetration imaging,anti-counterfeiting,and pupil recognition technologies.Interestingly,NIR mechanoluminescence(ML)was realized based on the developed phosphors,which were successfully applied for nondestructive measurements of solids and in vivo bioimaging.Our study proposes a series of tunable and broadband luminescent materials and devices for NIR applications.
基金supported financially by the National Natural Science Foundation of China(T2121003 received by X.D.,and U23A20638 received by Y.J.)the National Key Research and Development Program of China(2023YFB3208000 and 2023YFB3208001 received by Y.J.).
文摘Flexible sensing array integrated with multiple sensors is an attractive approach for flight parameter detection.However,the poor resolution of flexible sensors and time-consuming neural network processes mitigate their accuracy and adaptability in predicting flight parameters.Here we present an ultra-thin flexible sensing patch with a new configuration,comprising a differential pressure sensor array and a vector flow velocity sensor.The capacitive differential pressure sensor array is fabricated by a multilayer polyimide bonding technique,reaching a resolution of 0.14 Pa.To solve flight parameters with the flexible sensing patch,we develop an analytical pressure-velocity fusion algorithm,enabling fast response and high accuracy in flight parameter detection.The average errors in calculating the angle of attack,angle of sideslip,and airspeed are 0.22°,0.35°,and 0.73 m s^(-1),respectively.The high-resolution flexible sensors and novel analytical pressure-velocity fusion algorithm pave the way for flexible sensing patch-based air data sensing techniques.
